Car-bolster side bearing.



C. L. SCHWARTZ. CARl BOLSTER SIDE BEARING. APPLICATION FILED JA'N. 1.1910.-

Patented Nov. 8, 19110.

To all whom it 'may-cfmcern:v

ras relatan arten.

CARL L. SCHWARTZ, F El. LOUS, MSSUEI.

CAR-BOLSTER SIDE BEARING.

and has for its object to gradually limit-the sway of the car body dueto the horizontally acting centrifugal force when the truck is rounding a curve, by maintaining the engage'ment initially produced, of the body side-bearing with the truck sidebearing during the pivotal movementof the truck about the king-pin from its normal position in alinement with the body-bolster to its maximum inclination thereto in either direction without sudden and undue impact on the truckbolster and-compression or' the bolster-springs, which occurs with the ordinary side-bearings, and to utilize the engag ing force produced by the weight of the car body, in assisting the truck to travel more freely around the curve in the direction of the pressure on the side-bearings.

The invention consists in features of novelty as hereinafter-described and claimed, reference being had to the accompanying drawing formingv part of this specication, whereon,

Figure 1, is a side elevation of a metallic body-bolster and combined truck-bolster having my improved side-bearings applied. thereto; Fig. 2, a vertical transverse section to enlarged scale through the bolsters and corresponding longitudinal section through the side-bearings, on line 2, 2, in Fig. l, showing the bolster-s in central vertical alinement when the truck is on a straight track; Fig. 3, a similar view to Fig. 2, showing the relative positions of the side-bearings on the pivotal movement of the truck-bolster about the king-pin in the direction indicated by the arrow, when the truck is on a curve; Fig. Y' 4, a horizontal section to enlarged scale, through ,the body side-bearing, on' line 4, 4, in Fig. 2, showing the truck side-bearing and its attachment to the truck-bolster (broken away) in top plan View; Fig. 5, a similar View to Fig. l on line 5, 5, in Fig.

3, and Fig. 6, an end view of the side-bearings corresponding to their positions seen Specicaton of Letters Patent. Application tiled January 31, 1910.` Serial No. 541,122.

Patenten New. a, reto.

in Figs. 9. and 4l, and a side elevation of the adjacent `parts of the bolsters.

Like letters and numerals of reference denote like parts in all the figures.

a represents a preferably metallic truchbolster, and Z) the combined body-bolster ofl a railroad car, the holsters u and having the engaging center-plates l andj2 respectively, and )ivotal about theking-pin (not shown) in tlie usual well-known manner.

Projecting from the holsters a and at the usual distance along the saine on each side of their pivotal centena', are the truck and bodyl sidebearings c and c'V respectively, each truck side-bearing c, according to my invention, consisting of a block or rojection 3 of suitable height which is pre composed or" cast steel and tudinally across a., the block 3 havingits inner and outer sides preferably radial to the pivotal center re of the holsters a and b and formed at the bottom with outwardly projecting lugs 4 which are perforated vertically for the passage preferably, of bolts 5 3 is firmly tixed'to the truck-bolster a at the to) as shown. Or the block 3 may be flange( at the bottom and riveted therethrough Lto the bolster c, or may loe-integral with the latter as found most desirable.

The block 3 is formed or provided at the top with a longitudinally inclined, preferably convex, bearing-face 6 having its apex coincident with the longitudinal center of the truclnbolster a, the bearing-face 6 being preferably, a circular arc, and transversely inclined downward from the outer side of the block 3 radially to the pivotal support of the body-bolster b on the truclr-bolster a, or thereabout, and the block 3 preferably overlapping the sides of the truck-bolster a and formed at each end beyond the bearingface 6 with a horizontal bearing portion 7 for the purpose hereinafter particularly specified.

The body side-bearing c', which in the present case is formed by a dependent portion ot' the body-bolster D, is formed at the bottom with' a longitudinally inclined, preferably convex, bearing-face S which is similarly inclined transversely, and adapted to engage the bearing-face 6 of the truck sidehearing c, the bearing-face 8 having prefererably llmnged longi# the top of the truck-bolster whereby the block los ably, a corresponding radius or curvature to, and its apex coincident with and preferably clear of, the apex of the bearing-face 6 of the truck-b0lster a in the normal positions of `the bolster's a and b.

In operation, onl the movement of the truck-bolster a about its pivotal center when the truck is rounding a curv`e in either direction, in the present case in that indicated by the arrow in Fig. 3, the bearingface 8 of the body side-bearing c', after its initial contact with the bearing-face 6 of the truck-bolster a, consequent on the sway of the car body due to the horizontally acting centrifugal force on the truck leaving its normal position, Will descend the inclined bearing-face 6-on the diverging side of its apex from the body-bolster I), and in so doing retard the sway of the car body, While maintaining its engagement with the bearing-face 6,: and the resultant pressure of tlns engagement due to the Weight of the car body combined with the Wedge action of the practically sloping contact surfaces, Will operate to force the truck in the direction of, and enable it to travel around the curve more .freely than with the ordinary sidebearings; While the terminal horizontal bearing portions 7 of the truck side-bearing o will operate to prevent excessive vertical clearance between the side-bearlngs c and c',

in case of abnormal pivotal movement of the truck. n What I claim as my in'yention and desire to secure by Letters Patent is zl. A car side-bearing having a bearing' i'ng in horizontal portions inclined therewith transversely.

4. A car side-bearing having a bearingface longitudinally inclined from its apex in opposite directions, the said face terminating in horizontal portions radial therewithl to the pivotal center of the car-truck.

CAR-L L. SCHWARTZ.

Witnesses:

HAL C. BELLVILLE, C. T. WESTLAKE. 

